Arrangement for wall elements comprising two sheets with intermediate insulation



Jan. 25, 1966 B. JARREBY 3,230,680

ARRANGEMENT FOR WALL ELEMENTS COMPRISING TWO SHEETS WITH INTERMEDIATEINSULATION Filed Jan. 22, 1962 FIG 2.

FIGI.

mvcuron: BERT] L JARREBY ATTYS.

United States Patent F 3,230,680 FGR WALL ELEMENTS (ZOM- SHEETS WITHINTERMEDIATE The present invention relates to a novel and improvedarrangement in wall elements comprising two sheets with intermediateinsulation and an enclosing frame.

Wall elements of the aforesaid type are at present applied to anincreasing extent for the erection of Walls in drying and conditioningplants, as covers for cylinder driers, etc. In such plants the air atthe inner surface of the wall has in many cases a high relative humidityand due to the fact that for manufacturing reasons the sheets of thewall elements cannot be secured to the frame in such a manner that acomplete air sealing is obtained, there is always the risk of moist airentering the space between the sheets. When this air is cooled itscondensed moisture will be absorbed by the intermediate insulation anddeposited both on the inner surface of the external sheet and on theframe. As there is only very limited natural air exchange with theambient air through leaks in the external sheet, the said moisturedeposit remains within the intermediate space where it not onlyconstitutes corrosion risk but also contributes to a deterioration ofthe heat insulating capacity of the insulation and in certain cases eveneffects complete destruction of the insulation.

It is the object of the invention to eliminate the aforesaid drawback ina simple as well as reliable manner. The invention is characterized inthat the insulation is subdivided into a plurality of vertical fieldswith free spaces therebetween which, through openings provided in theupper and lower frame portions of the wall element, communicate with theambient air for utilizing the said free spaces for ventilating theinterior of the wall element.

A preferred embodiment of the invention is characterized in that thewall element comprises one entirely plane and one slightly corrugatedsheet, the said plane sheet being riveted to the frame by employing anintermediate sealing strip while the corrugated wall sheet is riveted tothe frame without such sealing strip whereby the wave troughs of thecorrugated sheet form the said ventilation openings to the said freespaces in the interior of the wall element.

More specifically, the aforesaid ventilation is rendered possible inthat the wall sheets are made of thin material glued on the intermediateinsulation, in such a manner that they together form a slab of athickness somewhat smaller than the width of a groove provided in theframe and enclosing the slab, and in that the said slab is secured tothe frame by so-called pope or blind riveting of the two wall sheets,the wall sheet last riveted along the frame thereby forming a slightlywaved or corrugated contact surface with the wave troughs constitutingthe said ventilation openings. The so-called pope rivets are of the typewhich can be inserted in a hole and by external pressure on a sleeve andpull on a stem have a head formed 3,230,680 Patented Jan. 25, 1966 ICCon the inner end of the sleeve. Similar fasteners in common use areknown as cherry rivets and mollys.

The bottom portion of the frame is provided with a plurality of throughholes through which any condensate collected therein may be drained off.

The invention will now be described more in detail with reference to theaccompanying drawings showing by way of example an embodiment of a wallelement according to the invention, and wherein FIG. 1 shows a wallelement in elevation, wherein the frame and sheets are partially out offto show the type of the intermediate insulation,

FIG. 2 is a section through the upper portion of the frame along theline 22 in FIG. 1,

FIG. 3 is a section of the bottom portion of the frame along the line3-3 in FIG. 1, and

FIG. 4 is a transverse section along the line 44 in FIG. 1.

In the drawing, 1 designates a frame for a wall element according to theinvention. Between an inner sheet 2 and an outer sheet 3 secured to theframe is laid insulation material 4 which in the embodiment shown isWellit. According to the invention the insulation is subdivided into aplurality of vertical fields with free spaces 9 therebetween Which formvertical through channels for ventilation. The wall sheets are securedto the frame by means of rivets 6 in such a manner that for obtaininggreatest possible sealing efiect towards the inside a sealing strip 7 isprovided between the inner sheet 2 and the frame 1. For securing theexternal sheet which is slightly corrugated no sealing is employed withthe result that spaces are formed at the wave troughs, which spacesserve as ventilation openings 5 connecting the ambient air with the saidfree spaces.

The said ventilation openings may be obtained without using an externalsheet which is corrugated in advance, in that the Wall element isconstructed of thin Wall sheets glued to the insulation material, thusforming a slab of a thickness somewhat smaller than the width of agroove provided on the frame and enclosing the slab, the said slab beingsecured to the frame by so-called pope or blind riveting. In thisembodiment the inner sheet, when being riveted, forms a slightlycorrugated contact surface With the wave troughs constituting the saidventilating openings.

The bottom portion of the frame is provided with a plurality of throughholes 8 for draining otf any condensate flowing down in the spacebetween the wall sheets, and collecting in the groove in the bottom ofthe frame.

The design of the frame as well as the fastening of the wall sheets maybe modified, of course, in dilferent Ways within the scope of theinventive idea.

What I claim is:

1. In wall elements comprising two sheets with intermediate insulationand a surrounding frame having a groove therein receiving said sheetsand insulation, the insulation being subdivided into a plurality ofvertical fields with free spaces therebetween, openings at the upper andlower ends of the wall element communicating with the ambient air inorder to utilize the said free spaces for ventilating the interior ofthe wall elements, the improvement wherein the wall sheets consist ofthin material glued to the insulation therebetween, said sheets andinsulation together forming a slab of a thickness some- What less thanthe width of the groove in the frame, the References Cited by theExaminer wall sheets being secured to the frame by blind rivets, theUNITED STATES PATENTS Wall sheet last riveted along the frame therebyforming 2 0 1 a a slightly waved contact surface with the Wave troughs61 12/1941 Ward 52 302 constituting the said ventilation openings. 5FOREIGN PATENTS 2. An arrangement according to claim 1 wherein the443,477 2/1936 Great Britain groove in the bottom portion of the frameis provided 11 194 1 194 Great Britain with a plurality of through-holesfor draining 01? any condensate collected therein. RICHARD W. COOKE,111., Primary Examiner.

1. IN WALL ELEMENTS COMPRISING TWO SHEETS WITH INTERMEDITATE INSULATIONAND A SURROUNDING FRAME HAVING A GROOVE THEREIN RECEIVING SAID SHEET ANDINSULATING, THE INSULATION BEING SUBDIVIDED INTO A PLURALITY OF VERTICALFIELDS WITH FREE SPACES THEREBETWEEN, OPENING AT THE UPPER AND LOWERENDS OF THE WALL ELEMENT COMMUNICATING WITH THE AMBIENT AIR IN ORDER TOUTILIZE THE SAID FREE SPACES FOR VENTILATING THE INTERIOR OF THE WALLELEMENTS, THE IMPROVEMENT WHEREIN THE WALL SHEETS CONSISTS OF THINMATERIAL GLUED TO THE INSULATION THEREBETWEEN, SAID SHEETS AND